R33 Shudders!

[rickytan]

While car was being cleaned, some water got into the engine bay. When accelerating the car shudders like hell, and when idling it miss fires every so often. Anyone know what the problem could be? I already went thru the sensors and dryed them out with a airhose, might be the injectors? anyone?

[RANDY]

Could water have made it to your coilpacks? The valley cover isn't great at keeping water out once the rubber seal cracks up.

[rickytan]

Could water have made it to your coil packs? The valley cover isn't great at keeping water out once the rubber seal cracks up.

I am actually a 1st year apprentice auto electrician, and my boss actually suggested the coil pack. I removed the plugs and cleaned them with some cleaner, then air dried them with a air hose. I haven't managed to check the coils yet. Ive noticed after driving for say 20-30 minutes it actually goes away, but say if i drive the car the next day.. its back again. Any more suggestions?

[MBS206]

Something near the engine, most likely coil packs, needs drying out big time, And not just being blown with a hose.

Set the oven at 120-130Degrees, and put a SPARE coil in, just to check it won't melt.

Then throw in your real ones (Coils shouldn't melt, as they're designed to run at around 100degrees celcius)

The oven is to get the water fully out.

[RANDY]

Also while you're at it, pull the rubber boots of the packs, and check that the hole that the springs sit in are not corroded or anything. Clean it out with cottonbuds and whatever cleaning solution you think is best, line all the springs up on a table and check that they're all the same length roughly. If there are any shorter ones, stretch them out again. Polish up the contact areas etc.

Who knows... you might accidentally fix the problem while checking and cleaning stuff.

[rickytan]

Okay today i took the cover off, took all the coils out and no water or residue was inside.. i dried all the sockets anyway but i don't think water is the problem anymore.. it may have started it but i don't believe its there anymore. It may be possible a coil is broken? Because when i took the coils out, i mixed them up and put them back in differently, and even tho the car still misfires at idle, the sound when i accelerate is different.. before it use to just do it when i acclerated heavy.. now it does it even while cruising. Its really starting to annoy me. my car feels so sluggish and it sounds like crap! how much do coils go for roughly and anyone else got feedback?

Ps. thanks for your feedback guys.

Pps. after cleaning all my plugs my hicas light is constantly on now? not sure if thats broken or if its fixed.. my hicas light has never came on before lol..

[crofte]

I have the same car and it sounds like you have the same problem I had. Get some splitfire coil packs. fixed my missfire on idle and also no more backfire at 4500 rpm. The old ones will be shorting through the plastic jacket.

[R33-Matty]

I know this topic is old news now, but just incase anyone else came across this problem at idle ive found the solution, well for me anyway.... all i needed to do was loosen the little screw on the AAC valve, you will find it at the back of the intake manifold close to the driver side window, there will be a plug connected with a purple plugtop for those who dont know already, it just looks like a normal screw, to increase airflow on idle just turn it counter clockwise while the engine is still running, you should notice a change with one revolution or two.... well fixed my problem anyway good luck